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3.2 Function List
3.2.4 Warning output function
3
SPECIFICATIONS
(c) Set the rate alarm upper limit value/lower limit value in 0.1%/s increments relative
to the maximum value (16000/12000/4000) of the digital output value.
The setting range is -32768 to 32767 (-3276.8% to 3276.7%).
(d) The setting range of the rate alarm warning detection period is 10 to 5000ms.
When the period is set to 5000ms, the digital values are compared at intervals of 5
seconds to detect the varying rate.
(e) The rate alarm is judged by converting the rate alarm upper/lower limit value into
the digit value per rate alarm warning detection period.
The expression for the value used to make judgment per rate alarm warning
detection period is as follows.
Value used to make judgment per rate alarm warning detection period [digit]
=rate alarm upper limit value or lower limit value 0.001 maximum value of the
digital output value rate alarm warning detection period 1000
(f) The rate alarm is useful to watch the varying rate of the digital output value in a
limited range.
1) Example of setting the rate alarm upper limit value/lower limit value when it is
desired to watch that the digital output value increases within the specified
range
Example
In channel 1, when the following:
• Upper limit value of change rate: 30%/s (300 is stored in buffer memory)
• Maximum digital output value: 16000
• Rate alarm warning detection period: 10ms
are set, a value [digit] used at every rate alarm warning detection period can be
calculated as follows:
300 0.001 16000 10 1000=48(digit)
Therefore, the current value is compared with the previous value every 10ms in
channel 1, and whether a difference of 48 (digit) or more is identified between
them or not is determined.
Rate alarm lower limit value
Time
Rate alarm upper limit value
+30%
+20%
0
Varying rate (%) of
digital output value
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